Nuclear densometer
US4618939A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 13, 1983 |
| Grant date | Oct 21, 1986 |
| Priority date | — |
| Expiry date | Jul 13, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N23/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system for quickly indicating changes in density of a flow of material using a radiactive source and detector where the count rate indicative of density is processed for sensing significant changes in the density in the flow of material as distinguished from random changes and for producing an indication of such changes. In one aspect of the invention, a time filter is utilized with an RC circuit and diodes to require a count rate indicative of a significant density change before producing an indication. In another aspect of the present invention the count rate is processed with respect to a predetermined formulation to determine the occurrence of a significant density change in a time frame and for producing an indication when such change occurs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.